Plug in update made site go blank

Please see https://www.ads-software.com/support/topic/how-to-debug-issues-after-updates?replies=1 It will be a conflict.

Additional note; even though this one is caused by a conflict, we will be adding a workaround in next update. You should still find out the source of conflict however.

This is the source of conflict? /home/tentsand/public_html/wp-content/plugins/woocommerce/includes/emails/class-wc-email.php on line 819
?? Not sure what to do to resolve this.

Thats the core class. Something else (plugin or theme) may also be calling that class causing it to be included twice.

HI all, does anyone found the plugin that is causing this problem?

Hi, I fixed this problem by changing name of abstract class WC_Email to abstract class WC_Email_ab ( file: woocommerce/includes/abstract/abstract-wc-email.php )

I had the same problem and upon investigation it was caused by Woocommerce PDF Invoices and Packing Slips Pro by WP Overnight. The free version did not cause a problem.